Some people still do not know what is the ductile iron fittings, it can be used as auxiliary materials to use, usually can be used in water supply industry, water industry, water industry, with nodular cast iron pipe in the application of high strength, high elongation, corrosion resistance, impact resistance and other aspects of the advantages. It is used for pipeline which, obviously improve the pipeline water environment, also provides water supply capacity, reduce energy consumption, using the flexible pipe interface, can make the pipe itself has a greater extend rate, make the pipeline and buried pipes can work together, so as to improve the stress state of the pipeline, to further improve the reliable performance of the pipe network, the water supply industry in China has been in the use of ductile iron pipe as a supervisor, it is important to an auxiliary material. The metal laser cutting machine manufacturers to remind you, Before the use of ductile iron pipe fittings, it is also necessary to know the condition of the pipe, and the laying of the pipe shall be determined according to the degree of freezing, the external load, and the crossing of other pipes